Long-peptide vaccination with driver gene mutations in p53 and Kras induces cancer mutation-specific effector as well as regulatory T cell responses
Mutated proteins arising from somatic mutations in tumors are promising targets for cancer immunotherapy. They represent true tumor-specific antigens (TSAs) as they are exclusively expressed in tumors, reduce the risk of autoimmunity and are more likely to overcome tolerance compared to wild-type (w...
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| Hauptverfasser: | , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
21 Sep 2018
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| In: |
OncoImmunology
Year: 2018, Jahrgang: 7, Heft: 12 |
| ISSN: | 2162-402X |
| DOI: | 10.1080/2162402X.2018.1500671 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1080/2162402X.2018.1500671 Verlag: https://doi.org/10.1080/2162402X.2018.1500671 
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| Verfasserangaben: | Jasmin Quandt, Christoph Schlude, Michael Bartoschek, Rainer Will, Angel Cid-Arregui, Sebastian Schölch, Christoph Reissfelder, Jürgen Weitz, Martin Schneider, Stefan Wiemann, Frank Momburg, and Philipp Beckhove |
MARC
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| 245 | 1 | 0 | |a Long-peptide vaccination with driver gene mutations in p53 and Kras induces cancer mutation-specific effector as well as regulatory T cell responses |c Jasmin Quandt, Christoph Schlude, Michael Bartoschek, Rainer Will, Angel Cid-Arregui, Sebastian Schölch, Christoph Reissfelder, Jürgen Weitz, Martin Schneider, Stefan Wiemann, Frank Momburg, and Philipp Beckhove |
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| 520 | |a Mutated proteins arising from somatic mutations in tumors are promising targets for cancer immunotherapy. They represent true tumor-specific antigens (TSAs) as they are exclusively expressed in tumors, reduce the risk of autoimmunity and are more likely to overcome tolerance compared to wild-type (wt) sequences. Hence, we designed a panel of long peptides (LPs, 28-35 aa) comprising driver gene mutations in TP35 and KRAS frequently found in gastrointestinal tumors to test their combined immunotherapeutic potential. We found increased numbers of T cells responsive against respective mutated and wt peptides in colorectal cancer patients that carry the tested mutations in their tumors than patients with other mutations. Further, active immunization of HLA(-A2/DR1)-humanized mice with mixes of the same mutated LPs yielded simultaneous, polyvalent CD8+/CD4+ T cell responses against the majority of peptides. Peptide-specific T cells possessed a multifunctional cytokine profile with CD4+ T cells showing a TH1-like phenotype. Two mutated peptides (Kras[G12V], p53[R248W]) induced significantly higher T cell responses than corresponding wt sequences and comprised HLA-A2/DR1-restricted mutated epitopes. However, vaccination with the same highly immunogenic LPs strongly increased systemic regulatory T cells (Treg) numbers in a syngeneic sarcoma model over-expressing these mutated protein variants and resulted in accelerated tumor outgrowth. In contrast, tumor outgrowth was delayed when vaccination was directed against tumor-intrinsic Kras/Tp53 mutations of lower immunogenicity. Conclusively, we show that LP vaccination targeting multiple mutated TSAs elicits polyvalent, multifunctional, and mutation-specific effector T cells capable of targeting tumors. However, the success of this therapeutic approach can be hampered by vaccination-induced, TSA-specific Tregs. | ||
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| 650 | 4 | |a Treg | |
| 650 | 4 | |a tumor mutation specific T cell responses | |
| 650 | 4 | |a tumor-specific mutated antigens | |
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